Adaptable drain plunger



FIG. 1 is a perspective view of an adaptable drain plunger showing my new design;

FIG. 2 is a front plan view, with the rear plan view and the side plan views being the same thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof. 

The ornamental design for an adaptable drain plunger, as shown. 